(Ethics) Two Brothers, a Small Book Publishing Company, Wrote Off the the Debt

Essay

(Ethics)
Two Brothers, a small book publishing company, wrote off the debt of The Learning Place, and the Academy of Basic Education, both small private schools, after it determined that the schools were facing serious financial difficulty. No notice of the action was sent to the schools; Two Brothers simply stopped sending bills. Nearly a year later, The Learning Place was given a large endowment and a government grant. The resulting publicity brought the school to the attention of Two Brothers, which immediately reinstated the account, and sent a new bill to the school, including interest for the entire time the debt was outstanding. No further action was taken regarding the Academy of Basic Education, which was still operational.
Required:
Did Two Brothers act ethically in reinstating the debt of one client, and not the other? Explain.